Iridescent and Glossy Effect on Polymer Surface using Micro/Nano Hierarchical Structure: Artificial Tulip Queen of the Night Petals.
ACS applied materials & interfaces(2019)
摘要
Many petals in nature have a hierarchical structure that imparts various optical properties. Among these, the petals of the Queen of the Night tulip exhibit an iridescent and glossy color due to the diffraction and scattering of light. Herein, we report a bioinspired micro/nano hierarchical structure that mimics Queen of the Night tulip petal surfaces. Using a method that combined soft lithography and UV-Ozone treatment, we fabricated nanoscale line patterns with a line-width of 600 nm on micro wrinkles of 15 μm width and 3 μm height. Using optical microscopy in dark-field mode and monochromatic light diffraction measurements, we found that these hierarchical structures on a polydimethylsiloxane (PDMS) substrate synergistically improved the scattering and diffraction effects, unlike the pristine, nano-, and micro-structures. In addition, using a dye-colored PDMS material, we fabricated artificial Queen of the Night petals with iridescent and glossy effects. They show great potential for a range of applications, such as coloring, smart displays, dynamic gratings, and light-control devices.
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关键词
hierarchical pattern,scattering diffraction,tulip Queen of the Night,micro-/nano structure
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